Electric signal transmitter



Apr. 10, 1923.

1,451,328 D. DESPLATS ELECTRIC SIGNAL TRANSMITTER Filed NOV. 4, 1919Inventor:

DOMINGO DESPl-HTS,

'"i M WW Attorney.

Patented Apr. 10, 1923.

DOMINGO.DESPLATS, OF BUENOS AIRES, ARGENTINA.

' ELECTRIC SIGNAL TRANSMITTER.

Application filed November 4, 1919. Serial No. 385,729.

To all whom it may concern:

Be it known that I, DOMINGO DESPLATS, a citizen of the ArgentineRepublic, residing at Buenos Aires, Argentina, have invented certain newand useful Improvements in Electric Signal Transmitters, of which thefollowing is a specification.

The present invention relates to an electric signal transmitter of thepush button type, and it consists essentially of a mechanism by means ofwhich a predetermined combination of signals can be. transmitted by asingle depression of the push button.

The object of the present invention is to obtain a device which will besimple in construction and reliable in action, and which "will have theadvantage over existing devices of a similar character in that, by asingle operation of the push button, a predetermined combination ofsignals can be transmitted.

For further comprehension of the invention reference will be had to thefollowing description and accompanying drawings in which is describedand illustrated the preferred embodiment of the invention.

Figure 1 is avertical section of an electric signal transmitterconstructed according to the present invention,

Figure 2 is a horizontal view taken on the line ab of Figure 1,

Figure 3 is a perspective view of an essential part of the presentdevice,

Figure 4: is a horizontal view taken on the line cd of. Figure 1, and

Figure 5 is an enlarged view showing the distributor plate 11 andcontacts thereon.

In the drawings, 1 represents the base, 2

' the cover and 3 the push button of the transmitter, all of which partsare known and common in devices of this kind. I

iVit-hin the base 1 is a recess enclosed by a waterproof and flexiblemembrane at which forms an air chamber 5. The membrane 4 is providedwith a disc 6 in which is formed an opening 6 adapted to be closed by avalve 7 formed'at one end with a ring or other suitable connection topermit the valve to be detachably connected to a spring 9, and at itsopposite end with an enlarged base 7 adapted to close the opening 6 atthe times desired.

One end of the spring 9 is secured to the base v1 of the transmitter,whilst the other end thereof is prolonged and supports the valve 7 bypassing through the ring thereof and also serves the purpose hereinafterto be described.

This springalso constitutes one of the poles of the transmitter, a freeend 9 tnereof acting as a contact.

Secured to the base 1 by means of a support 10 isa contact plate 11,made of insulating material, iii-which is formed two rows of small holes12 adapted to receive a wire 13, which constitutes the other pole of thetransmitter, and this wire is threaded through the holes in such amanner as to produce signals. on the pressing of the push button. of thedesired length and in the desired com bination.

The wire 13 projects laterally beyond the surface of plate 11 on oneside thereof only, that is to say, for example. on the surface nearestthe observer in Fig. 3, but on the opposite face it is inlaid so as notto project, the reason for which will hereinafter appear.

Thebase 1 is provided with a hole 14 through which the two wires 15, 15of the circuitarc led into the device. These wires 15, 15 are, ofcourse, respectively connected to the spring 9, constituting one pole ofthe device, and to the wire 13 constituting the other.

Holes 16 are provided for the reception of means for attaching thedevice in the desired position.

Theoperation'of the device may be described as follows: I

On the button 3 being pressed the flexible membrane 4 is depressed andthe valve 7 opens by reason of the enlarged base 7 thereof movingfromits seat against the underside of the disc 6, thus allowing air topass from the air chamber through the opening 6 in said disc. At thesame time the free end of the spring 9 is depressed in contact with thatvertical face of the contact plate 11 on which the Wire 13 is inlaid;therefore in its descent the spring does not contact with such wire andthe circuit is not completed.

hen the button 3 is released, the spring 9 will re-act and the free endthereof will, in its upward movement, travel up the op posite verticalface of plate 11 contacting with the wire 13 projecting therefrom, thuscompleting the circuit and transmitting signals of a predeterminedlength and in the desired combination. The downward and upward movementsof the free end of the spring 9, respectively on the opposite verticalfaces of the plate 11, is rendered possible by the disposition of theplate 11 obliquely to the vertical line which said free end wouldnormally follow when the button 3 is pressed. 7

The re-action of the spring 9 is prolonged and regulated by the valve 7,which permits the air to flow but slowly back past the same into the airchamber 5. I

Furthermore, it will be seen that the signals transmitted, on thepressing of the button 3, can be varied as to length and combination bythreading the wire 13 through such holes 12 in the plate 11 as will givethe desired signals. For example, in Figure 3 the wire13 has beenthreaded through such holes 12 as will result in one long signalfollowed by two shorter ones each time the button is pressed.

The construction hereinbefore described is primarily intendedfor use inconnection with an ordinary bell circuit, but it will be understood thatthe invention may be used in various other situations, such for example,as in telegraphic systems operated with the Morse system of signalling.

In accordance with the provisions of the patent statutes, I havedescribed the principleof my invention, together with the apparatuswhich I now consider to represent the best embodiment thereof, but Idesire it understood that my invention is not confined to the particularform of device herein shown and described, the same being merelyillustrative, and that the invention can be carried out in other wayswithout departing from the spirit thereof.

Claims:

1. Electric signal transmitter comprising, a base, a cover for saidbase, a push button, a spring engaging the push button, a dashpotadapted to delay the movement of the spring in one direction, a contactmovable with said spring,-a plate so arranged relatively to the saidcontact that the latter movesover one side of the plate in one part ofits travel and over the other side thereof in a succeeding part .of itstravel, and contacts on the plate eo-operating with the movable contactduring'one of said parts of its travel. a r

2. Electric signal transmitter comprising, a base, a cover for saidbase, a push button, a spring engagir g the push button, a dashpotadapted to delay the movement of the spring in one direction, a'contactmovable with said spring in a path substantially at right angles to thebase but with aslight degree of lateral freedom, an oblique plate ofinsulating material so disposed adjacent to I *of the plate out ofcontact with the movable contact.

3. Electric signal transmitter comprising, a base having a recesstherein, a cover for said'base, a push button, a spring engaging thepush button, a flexible membrane enclos ng the recess to form an airchamber, a valve in the membrane and connected to the spring, a contactplate co-operating withthe spring and arranged obliquely to the freepath of the end thereof whereby the said 7.

end moves over one side of the plate in one part of its travel and overthe other side thereof in a succeeding part of its travel, and a seriesof spaced contacts on the plate co-operating with the said end of thespring during one of said parts of its travel to transmit apredetermined combination of signals by a single depression of the pushbutton. I

4. Electric signal transmitter comprising, a base, a cover therefor, anair chamber formed by a flexible membrane within the base and cover, avalve in the membrane, a spring forming one pole of the circuitconnected to said valve, a push button movable in the cover and engagingthe spring, a contact plate having a plurality of holes therein andmounted on the base obliquely to the free path of one end of the spring,and a wire forming the other pole of the circuit threaded through suchholes as will produce signals in the desired combination on a singledepression of the push button.

In testimony whereof I afiix my signature in presence of two witnesses.

i D. DESPLATS. Witnesses J. N. GRAY, JULIAN CHAs. FAGUER.

